In an attempt to articulate my thoughts on life, the universe, and everything, I've determined what I think are the four dominant forces in the universe. Not sure why they've come about in this point of my life, but so it goes. They are, in no particular order:
CHAOS. The unpredictable, the unseen, the details we missed, and how they exert upon and impact one's existence.
COINCIDENCE. When the plans and actions - or the effects of chaos - impact another's.
OPPORTUNITY. An invitation to act. This could arise from coincidence, but not all coincidence results in an opportunity. Think of opportunity as a decision point.
PREPARATION. Actions one takes to move their life in the direction they want to go, or towards desires they want to fulfill. Those with a high degree of intellect, agency, and/or resources can move beyond basic necessities of survival to other, supposedly "higher-order" desire fulfillment.
These terms are drastically generalized, at the moment. Still working on it. For what purpose, I don't know.